Norcent LT3225 Service Manual page 39

32'' LCD TV
U401E
Super I/O
L4 IRR
IRR
N1 UART0TX
UART0TX
P1 UART0RX
UART0RX
L3 UART1TX
UART1TX
M1 UART1RX
UART1RX
H2
TPBIAS0
G2
TPA0_N
F1
TPA0
G1
TPB0_N
H3
TPB0
J4
TPBIAS1
J1
TPA1_N
H1
TPA1
J3
TPB1_N
J2
TPB1
G3 R413
1394_RSET
R1 I2C0CLK
I2C0CLK
P2 I2C0DATA
I2C0DAT
M3 I2C1CLK
I2C1CLK
M2 I2C1DATA
I2C1DAT
K5 TRSTN
TRSTN
K2 TDI
TDI
K4 TDO
TDO
K3 TMS
TMS
L1 TCK
TCLK
K1 TAPSEL
TAPSEL
W4 GPIO0
GPIO0
V5 GPIO1
GPIO1
U6 GPIO2
GPIO2
Y4 GPIO3
GPIO3
N5 RESETN
RESETN
M4
CLKIN
X401
N3 24.576MHz
CLKOUT
C4F3 C4F4
22pF 22pF
ZR39660BGCG
VCC3V3_G9 VCC3V3_G9
R430 R434
4.7K 1/16W 4.7K 1/16W
TAPSEL GPIO3 GPIO2
CN406 R445
NC/ 1K
"1110" - Boot from 8-bit NOR Flash
U408
232 XCVR
UART0TX 11
T1IN T1OUT
UART1TX 10
T2IN T2OUT
UART0RX 12
R1OUT R1IN
UART1RX 9
R2OUT R2IN
4
C2+ C+
C495
IRR 15
C497 1uF 5
C2- C1-
1uF 2
V+ V-
D5V
16
VCC GND
HIN232
+ C4J4
C4J3
0.1uF
10uF/16V
5.9K
I2C0CLK 2,12
I2C0DATA 2,12
JTAG/EJTAG
I2C1CLK 9,15
I2C1DATA 9,15
CN411
1
3
R416 33 1/16W 5
7
9
PU1 11
PU2 13
NC/ E-JTAG 2X7
* Key Pin 12
RESETN 4,8,15
晶振匹配，由 10 PF
改为 22 PF
5/12 HR/JASON
VCC3V3_G9 VCC3V3_G9 VCC3V3_G9
R433 R432 R431
4.7K 1/16W 4.7K 1/16W NC/ 4.7K
GPIO1 GPIO0
GPIO0
R466 R443 R467
NC/ 1K NC/ 1K 1K 1/16W
14
TXD_OUT 11
TXD_OUT1
7
13 CN107
RXD_IN 11
8 RXD_OUT1 CONN
1
FB410 300 OHM 1
C496 2
3 1uF 3
6 FB411 300 OHM
C498 C4K4 C4K5
15 1uF 10pF 10pF
CN402
TXD_OUT1
1
RXD_OUT1 2
3
NC/ 33G8009 3
2
4
6
8
10
12
14
VCC3V3_G9
JTAG_RSTN 15
VCC3V3_G9
PU1 R426 1K 1/16W
PU2 R427 1K 1/16W
TP402 TP401
VCC3V3_G9
I2C0CLK R428 4.7K 1/16W
I2C0DATA R429 4.7K 1/16W
TP420
D5V
TP419
I2C1CLK R438 4.7K 1/16W
I2C1DATA R440 4.7K 1/16W
SIO I/F
39
Norcent LT3225
VCC9A
R4L8
CN410
10K VCC9A
1
2
3
R4L7
RF_SEL
4.7K Q403
2SC2412K
NC/ 33L3802 3
TO RF SW
D5V
C4J5
D5V
R4H3 U419 NC/ PCA9554DH 0.1uF/16V
4.7K 1/16W
1 16
A0 VDD
2 15 I2C1DATA
A1 SDA
R4H8 3 14 I2C1CLK
A2 SCL
NC/ 0 1/16W
RF_SEL 4 13
I/O0 INT
R4H7 NC/ 0 1/16W 5 12
I/O1 I/O7
6 11
I/O2 I/O6
7 10
I/O3 I/O5
8 9
VSS I/O4
CHIP ID:42H
VCC3V3_G9
TDI R435 1K 1/16W
TDO R436 4.7K 1/16W
TMS R437 1K 1/16W
TCK R439 1K 1/16W
TRSTN R441 1K 1/16W
U412
I2C0CLK 6 8
SCL VCC
I2C0DATA 5 R4P8
SDA
10K 1/16W
1 7
NC0 WP
2
NC1
3 4
NC2 GND
24LC32A
I2C:
0xA0-0xAE
Title
Page 06 - GPIO I/F
Size Document Number
B
715T1961-
Date: Wednesday, May 17, 2006 Sheet
D5V
R4H4
4.7K 1/16W
VCC3V3_G9
C456
EEPROM_WP 3
0.1uF
Rev
B
6 of 19